Touch input correction for multi-form factor information handling system (IHS)

ABSTRACT

Embodiments systems and methods for touch input correction for a multi-form factor Information Handling System (IHS) are described. In an illustrative, non-limiting embodiment, an IHS may include a processor; and a memory coupled to the processor, the memory having program instructions stored thereon that, upon execution by the processor, cause the IHS to: identify a posture of a first display relative to a second display; and process a stylus input using at least one parallax value calculated, at least in part, based upon the posture.

FIELD

This disclosure relates generally to Information Handling Systems (IHSs), and more specifically, to systems and methods for touch input correction for a multi-form factor IHS.

BACKGROUND

As the value and use of information continues to increase, individuals and businesses seek additional ways to process and store information. One option available to users is Information Handling Systems (IHSs). An IHS generally processes, compiles, stores, and/or communicates information or data for business, personal, or other purposes thereby allowing users to take advantage of the value of the information. Because technology and information handling needs and requirements vary between different users or applications, IHSs may also vary regarding what information is handled, how the information is handled, how much information is processed, stored, or communicated, and how quickly and efficiently the information may be processed, stored, or communicated. The variations in IHSs allow for IHSs to be general or configured for a specific user or specific use such as financial transaction processing, airline reservations, enterprise data storage, or global communications. In addition, IHSs may include a variety of hardware and software components that may be configured to process, store, and communicate information and may include one or more computer systems, data storage systems, and networking systems.

Nowadays, users can choose among many different types of mobile IHS devices. Each type of device (e.g., tablets, 2-in-1s, mobile workstations, notebooks, netbooks, ultra-books, etc.) has unique portability, performance, and usability features; however, each also has its own trade-offs and limitations. For example, tablets have less compute power than notebooks and workstations, while notebooks and workstations lack the portability of tablets. A conventional 2-in-1 device combines the portability of a tablet with the performance of a notebook, but with a small display—an uncomfortable form factor in many use-cases.

The inventors hereof have determined that, as productivity continues to be a core tenet of modern computing, mobile IHS devices should provide versatility for many use-cases and display postures in use today (e.g., tablet mode, laptop mode, etc.), as well as future display postures (e.g., digital notebooks, new work surfaces, etc.). Additionally, mobile IHS devices should provide larger display area with reduced size and weight.

SUMMARY

Embodiments of systems and methods for touch input correction for a multi-form factor Information Handling System (IHS) are described. In an illustrative, non-limiting embodiment, an IHS may include a processor; and a memory coupled to the processor, the memory having program instructions stored thereon that, upon execution by the processor, cause the IHS to: identify a posture of a first display relative to a second display; and process a stylus input using at least one parallax value calculated, at least in part, based upon the posture. For example, the parallax value may include a first parallax value in a first axis, and a second parallax value in a second axis.

In some implementations, to identify the posture, the program instructions, upon execution by the processor, may cause the IHS to: receive an indication of an angle of a hinge coupling the first display to the second display; and identify the posture that corresponds to the angle, wherein the posture is selected from the group consisting of: laptop posture, canvas posture, tablet posture, stand posture, and tent posture. For example, the posture may be identified as the laptop posture in response to: the first display being placed at an obtuse angle with respect to the second display, and the second display being placed in a horizontal position with a display surface facing up.

Additionally, or alternatively, the posture may be identified as the canvas posture in response to: the first display being placed at a straight angle with respect to the second display, and the first and second displays being placed in a horizontal position with first and second display surfaces facing up. Additionally, or alternatively, the posture may be identified as the tablet posture in response to: a first display surface of the first display being placed facing up, and a back surface of the first display being placed against a back surface of the second display. Additionally, or alternatively, the posture may be identified as the stand posture in response to the first display being placed at an acute angle with respect to the second display. Additionally, or alternatively, the posture may be identified as the tent posture in response to a first display surface of the first display being placed at an obtuse angle with respect to a second display surface of the second display.

The program instructions, upon execution by the processor, may further cause the IHS to: identify an orientation of at least one of the first or second displays, and the at least one parallax value may be calculated, at least in part, based upon the orientation. For example, the orientation may be selected from the group consisting of: landscape and portrait.

Additionally, or alternatively, the program instructions, upon execution by the processor, may cause the IHS to: identify a change of position of at least one of the first or second displays; and in response to the change of position, adjust at least a first parallax value based on a first angle of the first display, and adjust at least a second parallax value based on a second angle of the second display. Additionally, or alternatively, the program instructions, upon execution by the processor, may cause the IHS to: identify a position of a keyboard; and in response to the position of the keyboard, modify the at least one parallax value. For example, the keyboard may be detected atop the second display, and the stylus input may be received in a region of the second display dynamically selected in response to the position of the keyboard.

The program instructions, upon execution by the processor, may cause the IHS to: identify a change from the posture to another posture; and process another stylus input using at least one other parallax value calculated, at least in part, based on the other posture.

In another illustrative, non-limiting embodiment, a method may include determining a bend radius of a display; and processing a touch input received via the display using at least one parallax value calculated, at least in part, based upon the bend radius. The method may also include determining an orientation of the display, where the at least one parallax value is further calculated, at least in part, based upon the orientation. Additionally, or alternatively, the method may include: identifying a change from the bend radius to another bend radius; and processing another touch input using at least one other parallax value calculated, at least in part, based upon the other bend radius.

In yet another illustrative, non-limiting embodiment, a hardware memory device may have program instructions stored thereon that, upon execution by a processor of an IHS, cause the IHS to: determine an orientation of a first display coupled to a second display via a hinge; and process a touch input using at least one parallax value calculated, at least in part, based upon the orientation. The program instructions, upon execution by the processor, may cause the IHS to determine an angle of the hinge, where the at least one parallax value is further calculated, at least in part, based upon the angle. Additionally, or alternatively, the program instructions, upon execution by the processor, may cause the IHS to: identify a change from the orientation to another orientation; and process another touch input using at least one other parallax value calculated, at least in part, based upon the other orientation.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention(s) is/are illustrated by way of example and is/are not limited by the accompanying figures, in which like references indicate similar elements. Elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale.

FIG. 1 is a perspective view of a multi-form factor Information Handling System (IHS) with a removable keyboard, according to some embodiments.

FIGS. 2 and 3 are block diagrams of components of the multi-form factor IHS and removable keyboard, respectively, according to some embodiments.

FIG. 4 is a block diagram of a multi-form factor configuration engine, according to some embodiments.

FIG. 5 is a flowchart of a method for configuring multi-form factor IHSs, according to some embodiments.

FIGS. 6A-C, 7A-J, 8A-D, and 9A-F illustrate examples of laptop, tablet, book, and display postures, respectively, according to some embodiments.

FIGS. 10A-C and 11A-C illustrate various use-cases, according to some embodiments.

FIGS. 12A-D, 13A, and 13B illustrate a first hinge implementation and a second hinge implementation, respectively, according to some embodiments.

FIG. 14 illustrates an accessory charging system, according to some embodiments.

FIGS. 15, 16A-C, 17A, and 17B illustrate a third hinge implementation, a fourth hinge implementation, and a fifth hinge implementation, respectively, according to some embodiments.

FIGS. 18A and 18B illustrate a folio case system, according to some embodiments.

FIG. 19 illustrates an accessory backpack system, according to some embodiments.

FIGS. 20A and 20B illustrate touch inputs received by a multi-form factor IHS with different hinge angles and/or postures, according to some embodiments.

FIG. 21 is a flowchart of a method for touch input calibration of a multi-form factor IHS, according to some embodiments.

FIG. 22 is a flowchart of a method for automatically correcting touch input in a multi-form factor IHS in response to hinge angle, posture, and/or orientation changes, according to some embodiments.

DETAILED DESCRIPTION

To facilitate explanation of the various systems and methods discussed herein, the following description has been split into sections. It should be noted, however, that any sections, headings, and subheadings used herein are for organizational purposes only, and are not meant to limit or otherwise modify the scope of the description nor the claims.

Overview

Embodiments described herein provide systems and methods for touch input correction for a multi-form factor Information Handling System (IHS). In various implementations, a mobile IHS device may include a dual-display, foldable IHS. Each display may include, for example, a Liquid Crystal Display (LCD), Organic Light-Emitting Diode (OLED), or Active Matrix OLED (AMOLED) panel or film, equipped with a touchscreen configured to receive touch inputs. The dual-display, foldable IHS may be configured by a user in any of a number of display postures, including, but not limited to: laptop, tablet, book, clipboard, stand, tent, and/or display.

A user may operate the dual-display, foldable IHS in various modes using a virtual, On-Screen Keyboard (OSK), or a removable, physical keyboard. In some use cases, a physical keyboard may be placed atop at least one of the screens to enable use of the IHS as a laptop, with additional User Interface (UI) features (e.g., virtual keys, touch input areas, etc.) made available via the underlying display, around the keyboard. In other use cases, the physical keyboard may be placed in front of the IHS to expose a larger display area. The user may also rotate the dual-display, foldable IHS, to further enable different modalities with the use of the physical keyboard. In some cases, when not in use, the physical keyboard may be placed or stored inside the dual-display, foldable IHS.

FIG. 1 is a perspective view of multi-form factor Information Handling System (IHS) 100 with removable keyboard 103. As shown, first display 101 is coupled to second display 102 via hinge 104, and keyboard 103 sits atop second display 102. The current physical arrangement of first display 101 and second display 102 creates a laptop posture, such that first display 101 becomes primary display area 105 presented by IHS 100, where video or display frames may be rendered for viewing by a user.

According to various embodiments, each of displays 101 and 102 may implement a display surface and an integrated touch screen digitizer. Examples of touchscreens or digitizers include, but are not limited to, a resistive touch surface, a surface acoustic wave touch surface, a capacitive touch surface, an infrared detection touch surface, etc. Moreover, touch instruments operable with displays 101 and 102 may include one or more fingers, a stylus or pen 108, a manually controlled pointing device, a totem (e.g., a DELL totem), etc.

In operation, in this particular laptop posture, second display 102 may sit horizontally on a work surface with its display surface facing up, and keyboard 103 may be positioned on top of second display 102, occluding a part of its display surface. In response to this posture and keyboard position, IHS 100 may dynamically produce a first UI feature in the form of at least one configurable secondary display area 106 (a “ribbon area” or “touch bar”), and/or a second UI feature in the form of at least one configurable touch input area 107 (a “virtual trackpad”), using the touchscreen of second display 102.

To identify a current posture of IHS 100 and a current physical relationship or spacial arrangement (e.g., distance, position, speed, etc.) between display(s) 101/102 and keyboard 103, IHS 100 may be configured to use one or more sensors disposed in first display 101, second display 102, keyboard 103, and/or hinge 104. Based upon readings from these various sensors, IHS 100 may then select, configure, modify, and/or provide (e.g., content, size, position, etc.) one or more UI features.

In various embodiments, displays 101 and 102 may be coupled to each other via hinge 104 to thereby assume a plurality of different postures, including, but not limited, to: laptop, tablet, book, or display.

When display 102 is disposed horizontally in laptop posture, keyboard 103 may be placed on top of display 102, thus resulting in a first set of UI features (e.g., ribbon area or touch bar 106, and/or touchpad 107). Otherwise, with IHS 100 still in the laptop posture, keyboard 103 may be placed next to display 102, resulting in a second set of UI features.

As used herein, the term “ribbon area” or “touch bar” 106 refers to a dynamic horizontal or vertical strip of selectable and/or scrollable items, which may be dynamically selected for display and/or IHS control depending upon a present context, use-case, or application. For example, when IHS 100 is executing a web browser, ribbon area or touch bar 106 may show navigation controls and favorite websites. Then, when IHS 100 operates a mail application, ribbon area or touch bar 106 may display mail actions, such as replying or flagging. In some cases, at least a portion of ribbon area or touch bar 106 may be provided in the form of a stationary control strip, providing access to system features such as brightness and volume. Additionally, or alternatively, ribbon area or touch bar 106 may enable multitouch, to support two or more simultaneous inputs.

In some cases, ribbon area 106 may change position, location, or size if keyboard 103 is moved alongside a lateral or short edge of second display 102 (e.g., from horizontally displayed alongside a long side of keyboard 103 to being vertically displayed alongside a short side of keyboard 103). Also, the entire display surface of display 102 may show rendered video frames if keyboard 103 is moved alongside the bottom or long edge of display 102. Conversely, if keyboard 103 is removed of turned off, yet another set of UI features, such as an OSK, may be provided via display(s) 101/102. As such, in many embodiments, the distance and/or relative position between keyboard 103 and display(s) 101/102 may be used to control various aspects the UI.

During operation, the user may open, close, flip, swivel, or rotate either of displays 101 and/or 102, via hinge 104, to produce different postures. In each posture, a different arrangement between IHS 100 and keyboard 103 results in different UI features being presented or made available to the user. For example, when second display 102 is folded against display 101 so that the two displays have their backs against each other, IHS 100 may be said to have assumed a canvas posture (e.g., FIGS. 7A-F), a tablet posture (e.g., FIG. 7G-J), a book posture (e.g., FIG. 8D), a stand posture (e.g., FIGS. 9A and 9B), ora tent posture (e.g., FIGS. 9C and 9D), depending upon whether IHS 100 is stationary, moving, horizontal, resting at a different angle, and/or its orientation (landscape vs. portrait).

In many of these scenarios, placement of keyboard 103 upon or near display(s) 101/102, and subsequent movement or removal, may result in a different set of UI features than when IHS 100 is in laptop posture.

In many implementations, different types of hinges 104 may be used to achieve and maintain different display postures, and to support different keyboard arrangements. Examples of suitable hinges 104 include, but are not limited to: a 360-hinge (FIGS. 12A-D), a jaws hinge (FIGS. 13A and 13B), a watchband hinge (FIG. 15), a gear hinge (FIGS. 16A-C), and a slide hinge (FIGS. 17A and 17B). One or more of these hinges 104 may include wells or compartments (FIG. 14) for docking, cradling, charging, or storing accessories. Moreover, one or more aspects of hinge 104 may be monitored via one or more sensors (e.g., to determine whether an accessory is charging) when controlling the different UI features.

In some cases, a folio case system (FIGS. 18A and 18B) may be used to facilitate keyboard arrangements. Additionally, or alternatively, an accessory backpack system (FIG. 19) may be used to hold keyboard 103 and/or an extra battery or accessory.

For purposes of this disclosure, an IHS may include any instrumentality or aggregate of instrumentalities operable to compute, calculate, determine, classify, process, transmit, receive, retrieve, originate, switch, store, display, communicate, manifest, detect, record, reproduce, handle, or utilize any form of information, intelligence, or data for business, scientific, control, or other purposes. For example, an IHS may be a personal computer (e.g., desktop or laptop), tablet computer, mobile device (e.g., Personal Digital Assistant (PDA) or smart phone), server (e.g., blade server or rack server), a network storage device, or any other suitable device and may vary in size, shape, performance, functionality, and price. An IHS may include Random Access Memory (RAM), one or more processing resources such as a Central Processing Unit (CPU) or hardware or software control logic, Read-Only Memory (ROM), and/or other types of nonvolatile memory. Additional components of an IHS may include one or more disk drives, one or more network ports for communicating with external devices as well as various I/O devices, such as a keyboard, a mouse, touchscreen, and/or a video display. An IHS may also include one or more buses operable to transmit communications between the various hardware components.

FIG. 2 is a block diagram of components 200 of multi-form factor IHS 100. As depicted, components 200 include processor 201. In various embodiments, IHS 100 may be a single-processor system, or a multi-processor system including two or more processors. Processor 201 may include any processor capable of executing program instructions, such as a PENTIUM series processor, or any general-purpose or embedded processors implementing any of a variety of Instruction Set Architectures (ISAs), such as an x86 ISA or a Reduced Instruction Set Computer (RISC) ISA (e.g., POWERPC, ARM, SPARC, MIPS, etc.).

IHS 100 includes chipset 202 coupled to processor 201. In certain embodiments, chipset 202 may utilize a QuickPath Interconnect (QPI) bus to communicate with processor 201. In various embodiments, chipset 202 may provide processor 201 with access to a number of resources. Moreover, chipset 202 may be coupled to communication interface(s) 205 to enable communications via various wired and/or wireless networks, such as Ethernet, WiFi, BLUETOOTH, cellular or mobile networks (e.g., CDMA, TDMA, LTE, etc.), satellite networks, or the like. For example, communication interface(s) 205 may be coupled to chipset 202 via a PCIe bus.

Chipset 202 may be coupled to display controller(s) 204, which may include one or more or graphics processor(s) (GPUs) on a graphics bus, such as an Accelerated Graphics Port (AGP) or Peripheral Component Interconnect Express (PCIe) bus. As shown, display controller(s) 204 provide video or display signals to first display device 101 and second display device 202. In other implementations, any number of display controller(s) 204 and/or display devices 101/102 may be used.

Each of display devices 101 and 102 may include a flexible display that is deformable (e.g., bent, folded, rolled, or stretched) by an external force applied thereto. For example, display devices 101 and 102 may include LCD, OLED, or AMOLED, plasma, electrophoretic, or electrowetting panel(s) or film(s). Each display device 101 and 102 may include a plurality of pixels arranged in a matrix, configured to display visual information, such as text, two-dimensional images, video, three-dimensional images, etc.

Display device(s) 101/102 may be configured to sense haptic and/or physical touch events, and to generate touch information. To this end, display device(s) 101/102 may include a touchscreen matrix (e.g., a layered capacitive panel or the like) and/or touch controller configured to receive and interpret multi-touch gestures from a user touching the screen with a stylus or one or more fingers. In some cases, display and touch control aspects of display device(s) 101/102 may be collectively operated and controlled by display controller(s) 204.

In some cases, display device(s) 101/102 may also comprise a deformation or bending sensor configured to generate deformation or bending information including, but not limited to: the bending position of a display (e.g., in the form of a “bending line” connecting two or more positions at which bending is detected on the display), bending direction, bending angle, bending speed, etc. In these implementations, display device(s) 101/102 may be provided as a single continuous display, rather than two discrete displays.

Chipset 202 may also provide processor 201 and/or display controller(s) 204 with access to memory 203. In various embodiments, system memory 203 may be implemented using any suitable memory technology, such as static RAM (SRAM), dynamic RAM (DRAM) or magnetic disks, or any nonvolatile/Flash-type memory, such as a solid-state drive (SSD) or the like. Memory 203 may store program instructions that, upon execution by processor 201 and/or controller(s) 204, present a UI interface to a user of IHS 100.

Chipset 202 may further provide access to one or more hard disk and/or solid-state drives 207. In certain embodiments, chipset 202 may also provide access to one or more optical drives or other removable-media drives. In certain embodiments, chipset 202 may also provide access to one or more Universal Serial Bus (USB) ports 208.

Upon booting of IHS 100, processor(s) 201 may utilize Basic Input/Output System (BIOS) 209 instructions to initialize and test hardware components coupled to IHS 100 and to load an Operating System (OS) for use by IHS 100. BIOS 209 provides an abstraction layer that allows the OS to interface with certain hardware components that are utilized by IHS 100. Via the hardware abstraction layer provided by BIOS 209, software stored in memory 203 and executed by the processor(s) 201 of IHS 100 is able to interface with certain I/O devices that are coupled to the IHS 100. The Unified Extensible Firmware Interface (UEFI) was designed as a successor to BIOS. As a result, many modern IHSs utilize UEFI in addition to or instead of a BIOS. As used herein, BIOS is intended to also encompass UEFI.

Chipset 202 may also provide access to one or more user input devices 206, for example, using a super I/O controller or the like. For instance, chipset 202 may provide access to a keyboard (e.g., keyboard 103), mouse, trackpad, stylus, totem, or any other peripheral input device, including touchscreen displays 101 and 102. These input devices may interface with chipset 202 through wired connections (e.g., in the case of touch inputs received via display controller(s) 204) or wireless connections (e.g., via communication interfaces(s) 205). In some cases, chipset 202 may be used to interface with user input devices such as keypads, biometric scanning devices, and voice or optical recognition devices.

In certain embodiments, chipset 202 may also provide an interface for communications with one or more sensors 210. Sensors 210 may be disposed within displays 101/102 and/or hinge 104, and may include, but are not limited to: electric, magnetic, radio, optical, infrared, thermal, force, pressure, acoustic, ultrasonic, proximity, position, deformation, bending, direction, movement, velocity, rotation, and/or acceleration sensor(s). In some cases, each of displays 101/102 may include a corresponding 9-DOF (degrees of freedom) sensor 210, or the like.

FIG. 3 is a block diagram of components 300 of keyboard 103. As depicted, components 300 include keyboard controller or processor 301, coupled to keyboard sensor(s) 303 and wireless communication module 302. In various embodiments, keyboard controller 301 may be configured to detect keystrokes made by user upon a keyboard matrix, and it may transmit those keystrokes to IHS 100 via wireless module 302 using a suitable protocol (e.g., BLUETOOTH). Keyboard sensors 303, which may also include any of the aforementioned types of sensor(s), may be disposed under keys and/or around the keyboard's enclosure, to provide information regarding the location, arrangement, or status of keyboard 103 to IHS 100 via wireless module 302. In other implementations, however, one or more keyboard sensors 303 (e.g., one or more Hall effect sensors, a magnetometer, etc.) may be disposed within first and/or second displays 101/102.

In some cases, a magnetic attachment and alignment system(s) may enable keyboard 103 to be attached to second display 102 (on the display surface, or on the back of display 102), and/or to be aligned on/off the surface of display 102, at predetermined locations. Moreover, display and/or hinge sensors 210 may be configured to determine which of a plurality of magnetic devices are presently engaged, so that the current position of keyboard 103 may be ascertained with respect to IHS 100. For example, keyboard 103 may have magnetic devices disposed along its short sides at selected locations. Moreover, second display 102 may include magnetic devices at locations that correspond to the keyboard's magnetic devices, and which snap keyboard 103 into any number of predetermined locations over the display surface of second display 102 alongside its short sides.

In various embodiments, systems and methods for on-screen keyboard detection may include a “fixed-position via Hall sensors” solution implemented as hardware/firmware that reads the multiple Hall sensors' information, calculates where a keyboard is detected, and sends the keyboard location (fixed positions) information to an OS. Additionally, or alternatively, these systems and methods may include a “variable-position via Hall sensors” solution implemented as hardware/firmware that reads a single Hall sensor's information based on the variable Gauss value of magnet(s) on keyboard 103.

Additionally, or alternatively, these systems and methods may include a “variable position via magnetometer” solution implemented as hardware/firmware that reads a single magnetometer's information based the relative location a single magnet on keyboard 103. Additionally, or alternatively, these systems and methods may include a “variable position via 3D Hall sensor” solution implemented as hardware/firmware that reads a 3D Hall sensor's information based the relative location a programmed magnet (different polarities) or array of magnets in different orientations on keyboard 103.

In some cases, by using magnetic keyboard detection, instead of relying upon touch sensors or the digitizer built into display 102, systems and methods described herein may be made less complex, using less power and fewer compute resources. Moreover, by employing a separate magnetic sensing system, IHS 100 may turn off touch in selected areas of display 102 such as, for example, in the areas of display 102 covered by keyboard 103.

In various embodiments, IHS 100 and/or keyboard 103 may not include all of components 200 and/or 300 shown in FIGS. 2 and 3, respectively. Additionally, or alternatively, IHS 100 and/or keyboard 103 may include components in addition to those shown in FIGS. 2 and 3, respectively. Additionally, or alternatively, components 200 and/or 300, represented as discrete in FIGS. 2 and 3, may be integrated with other components. For example, all or a portion of the functionality provided by components 200 and/or 300 may be provided as a System-On-Chip (SOC), or the like.

FIG. 4 is a block diagram of multi-form factor configuration engine 401. Particularly, multi-form factor configuration engine 401 may include electronic circuits and/or program instructions that, upon execution, cause IHS 100 to perform a number of operation(s) and/or method(s) described herein.

In various implementations, program instructions for executing multi-form factor configuration engine 401 may be stored in memory 203. For example, engine 401 may include one or more standalone software applications, drivers, libraries, or toolkits, accessible via an Application Programming Interface (API) or the like. Additionally, or alternatively, multi-form factor configuration engine 401 may be included the IHS's OS.

In other embodiments, however, multi-form factor configuration engine 401 may be implemented in firmware and/or executed by a co-processor or dedicated controller, such as a Baseband Management Controller (BMC), or the like.

As illustrated, multi-form factor configuration engine 401 receives Graphical User Interface (GUI) input or feature 402, and produces GUI output or feature 403, in response to receiving and processing one or more or: display sensor data 406, hinge sensor data 407, and/or keyboard sensor data 408. Additionally, or alternatively, multi-form factor configuration engine 401 may produce touch control feature 404 and/or other commands 405.

In various embodiments, GUI input 402 may include one or more images to be rendered on display(s) 101/102, and/or one or more entire or partial video frames. Conversely, GUI output 403 may include one or more modified images (e.g., different size, color, position on the display, etc.) to be rendered on display(s) 101/102, and/or one or more modified entire or partial video frames.

For instance, in response to detecting, via display and/or hinge sensors 406/407, that IHS 100 has assumed a laptop posture from a closed or “off” posture, GUI OUT 403 may allow a full-screen desktop image, received as GUI IN 402, to be displayed first display 101 while second display 102 remains turned off or darkened. Upon receiving keyboard sensor data 408 indicating that keyboard 103 has been positioned over second display 102, GUI OUT 403 may produce a ribbon-type display or area 106 around the edge(s) of keyboard 103, for example, with interactive and/or touch selectable virtual keys, icons, menu options, pallets, etc. If keyboard sensor data 408 then indicates that keyboard 103 has been turned off, for example, GUI OUT 403 may produce an OSK on second display 102.

Additionally, or alternatively, touch control feature 404 may be produced to visually delineate touch input area 107 of second display 102, to enable its operation as a user input device, and to thereby provide an UI interface commensurate with a laptop posture. Touch control feature 404 may turn palm or touch rejection on or off in selected parts of display(s) 101/102. Also, GUI OUT 403 may include a visual outline displayed by second display 102 around touch input area 107, such that palm or touch rejection is applied outside of the outlined area, but the interior of area 107 operates as a virtual trackpad on second display 102.

Multi-form factor configuration engine 401 may also produce other commands 405 in response to changes in display posture and/or keyboard state or arrangement, such as commands to turn displays 101/102 on or off, enter a selected power mode, charge or monitor a status of an accessory device (e.g., docked in hinge 104), etc.

FIG. 5 is a flowchart of method 500 for configuring multi-form factor IHSs. In various embodiments, method 500 may be performed by multi-form factor configuration engine 401 under execution of processor 201. At block 501, method 500 includes identifying a display posture—that is, a relative physical arrangement between first display 101 and second display 102. For example, block 501 may use sensor data received from displays 101/102 and/or hinge 104 to distinguish among the various postures shown below.

At block 502, method 500 selects a UI feature corresponding to the identified posture. Examples of UI features include, but are not limited to: turning a display on or off; displaying a full or partial screen GUI; displaying a ribbon area; providing a virtual trackpad area; altering touch control or palm rejection settings; adjusting the brightness and contrast of a display; selecting a mode, volume, and/or or directionality of audio reproduction; etc.

At block 503, method 500 may detect the status of keyboard 103. For example, block 503 may determine that keyboard 103 is on or off, resting between two closed displays, horizontally sitting atop display(s) 101/102, or next to display(s) 101/102. Additionally, or alternatively, block 503 may determine the location or position of keyboard 103 relative to display 102, for example, using Cartesian coordinates. Additionally, or alternatively, block 503 may determine an angle between keyboard 103 and displays 101/102 (e.g., a straight angle if display 102 is horizontal, or a right angle if display 102 is vertical).

Then, at block 504, method 500 may modify the UI feature in response to the status of keyboard 103. For instance, block 504 may cause a display to turn on or off, it may change the size or position of a full or partial screen GUI or a ribbon area, it may change the size or location of a trackpad area with changes to control or palm rejection settings, etc. Additionally, or alternatively, block 504 may produce a new interface feature or remove an existing feature, associated with a display posture, in response to any aspect of the keyboard status meeting a selected threshold of falling within a defined range of values.

FIGS. 6A-C, 7A-J, 8A-D, and 9A-F illustrate examples of laptop, tablet, book, and display postures which may be detected by operation of block 501 of method 500 during execution of multi-form factor configuration engine 401 by IHS 100.

Particularly, FIGS. 6A-C show a laptop posture, where a first display surface of first display 101 is facing the user at an obtuse angle with respect to a second display surface of second display 102, and such that second display 102 is disposed in a horizontal position, with the second display surface facing up. In FIG. 6A, state 601 shows a user operating IHS 100 with a stylus or touch on second display 102. In FIG. 6B, state 602 shows IHS 100 with keyboard 103 positioned off the bottom edge or long side of second display 102, and in FIG. 6C, state 603 shows the user operating keyboard 103 atop second display 102.

FIGS. 7A-J show a tablet posture, where first display 101 is at a straight angle with respect to second display 102, such that first and second displays 101 and 102 are disposed in a horizontal position, with the first and second display surfaces facing up. Specifically, FIG. 7A shows state 701 where IHS 100 is in a side-by-side, portrait orientation without keyboard 103, FIG. 7B shows state 702 where keyboard 103 is being used off the bottom edges or short sides of display(s) 101/102, and FIG. 7C shows state 703 where keyboard 103 is located over both displays 101 and 102. In FIG. 7D, state 704 shows IHS 100 in a side-by-side, landscape configuration without keyboard 103, in FIG. 7E state 705 shows keyboard 103 being used off the bottom edge or long side of second display 102, and in FIG. 7F state 706 shows keyboard 103 on top of second display 102.

In FIG. 7G, state 707 shows first display 101 rotated around second display 102 via hinge 104 such that the display surface of second display 102 is horizontally facing down, and first display 101 rests back-to-back against second display 102, without keyboard 103; and in FIG. 7H, state 708 shows the same configuration, but with keyboard 103 placed off the bottom or long edge of display 102. In FIGS. 7I and 7J, states 709 and 710 correspond to states 707 and 708, respectively, but with IHS 100 in a portrait orientation.

FIG. 8A-D show a book posture, similar to the tablet posture of FIGS. 7A-J, but such that neither one of displays 101 or 102 is horizontally held by the user and/or such that the angle between the display surfaces of the first and second displays 101 and 102 is other than a straight angle. In FIG. 8A, state 801 shows dual-screen use in portrait orientation, in FIG. 8B state 802 shows dual-screen use in landscape orientation, in FIG. 8C state 803 shows single-screen use in landscape orientation, and in FIG. 8D state 804 shows single-screen use in portrait orientation.

FIGS. 9A-F show a display posture, where first display 100 is at an acute angle with respect to second display 102, and/or where both displays are vertically arranged in a portrait orientation. Particularly, in FIG. 9A state 901 shows a first display surface of first display 102 facing the user and the second display surface of second display 102 horizontally facing down in a stand configuration (“stand”), whereas in FIG. 9B state 902 shows the same stand configuration but with keyboard 103 used off the bottom edge or long side of display 101. In FIG. 9C, state 903 shows a display posture where display 102 props up display 101 in a tent configuration (“tent”), and in FIG. 9D, state 904 shows the same tent configuration but with keyboard 103 used off the bottom edge or long side of display 101. In FIG. 9E, state 905 shows both displays 101 and 102 resting vertically or at display angle, and in FIG. 9F state 906 shows the same configuration but with keyboard 103 used off the bottom edge or long side of display 101.

It should be noted that the aforementioned postures, and their various respective keyboard states, are described for sake of illustration. In different embodiments, however, other postures and keyboard states may be used, for example, depending upon the type of hinge coupling the displays, the number of displays used, or other accessories. For instance, when IHS 100 is chargeable via a charging or docking station, the connector in the docking station may be configured to hold IHS 100 at angle selected to facility one of the foregoing postures (e.g., keyboard states 905 and 906).

FIGS. 10A-C illustrate a first example use-case of method 500 in the context of a laptop posture. In state 1000A of FIG. 10A, first display 101 shows primary display area 1001, keyboard 103 sits atop second display 102, and second display 102 provides UI features such as first ribbon area 1002 (positioned between the top long edge of keyboard 103 and hinge 104) and touch area 1003 (positioned below keyboard 103). As keyboard 103 moves up or down on the surface of display 102, ribbon area 1002 and/or touch area 1003 may dynamically move up or down, or become bigger or smaller, on second display 102. In some cases, when keyboard 103 is removed, a virtual OSK may be rendered (e.g., at that same location) on the display surface of display 102.

In state 1000B of FIG. 10B, in response to execution of method 500 by multi-form factor configuration engine 401, first display 101 continues to show main display area 1001, but keyboard 103 has been moved off of display 102. In response, second display 102 now shows secondary display area 1004 and also second ribbon area 1005. In some cases, second ribbon area 1005 may include the same UI features (e.g., icons, etc.) as also shown in area 1002, but here repositioned to a different location of display 102 nearest the long edge of keyboard 103. Alternatively, the content of second ribbon area 1005 may be different from the content of first ribbon area 1002.

In state 1000C of FIG. 100, during execution of method 500 by multi-form factor configuration engine 401, IHS 100 detects that physical keyboard 103 has been removed (e.g., out of wireless range) or turned off (e.g., low battery), and in response display 102 produces a different secondary display area 1006 (e.g., smaller than 1004), as well as OSK 1007.

FIGS. 11A-C illustrate a second example use-case of method 500 in the context of a tablet posture. In state 1100A of FIG. 11A, second display 102 has its display surface facing up, and is disposed back-to-back with respect to second display 102, as in states 709/710, but with keyboard 103 sitting atop second display 102. In this state, display 102 provides UI features such primary display area 1101 and first ribbon area 1102, positioned as shown. As keyboard 103 is repositioned up or down on the surface of display 102, display area 1101, first ribbon area 1102, and/or touch area 1103 may also be moved up or down, or made bigger or smaller, by multi-form factor configuration engine 401.

In state 1100B of FIG. 11B, keyboard 103 is detected off of the surface of display 102. In response, first display 101 shows modified main display area 1103 and modified ribbon area 1104. In some cases, modified ribbon area 1104 may include the same UI features as area 1102, but here repositioned to a different location of display 102 nearest the long edge of keyboard 103. Alternatively, the content of second ribbon area 1104 may be different from the content of first ribbon area 1102. In some cases, the content and size of modified ribbon area 1104 may be selected in response to a distance between keyboard 103 and display 102.

In state 1100C of FIG. 11C, during continued execution of method 500, multi-form factor configuration engine 401 detects that physical keyboard 103 has been removed or turned off, and in response display 102 produces yet another display area 1105 (e.g., larger than 1003 or 1002), this time without an OSK.

In various embodiments, the different UI behaviors discussed in the aforementioned use-cases may be set, at least in part, by policy and/or profile, and stored in a preferences database for each user. In this manner, UI features and modifications of blocks 502 and 504, such as whether touch input area 1003 is produced in state 1000A (and/or its size and position on displays 101/102), or such as whether ribbon area 1102 is produced in state 1100A (and/or its size and position on displays 101/102), may be configurable by a user.

FIGS. 12A-D illustrate a 360-hinge implementation, usable as hinge 104 in IHS 100, in four different configurations 1200A-D, respectively. Particularly, 360-hinge 104 may include a plastic, acrylic, polyamide, polycarbonate, elastic, and/or rubber coupling, with one or more internal support, spring, and/or friction mechanisms that enable a user to rotate displays 101 and 102 relative to one another, around the axis of 360-hinge 104.

Hinge configuration 1200A of FIG. 12A may be referred to as a closed posture, where at least a portion of a first display surface of the first display 101 is disposed against at least a portion of a second display surface of the second display 102, such that the space between displays 101/102 accommodates keyboard 103. When display 101 is against display 102, stylus or accessory 108 may be slotted into keyboard 103. In some cases, stylus 108 may have a diameter larger than the height of keyboard 103, so that 360-hinge 104 wraps around a portion of the circumference of stylus 108 and therefore holds keyboard 103 in place between displays 101/102.

Hinge configuration 1200B of FIG. 12B shows a laptop posture between displays 101/102. In this case, 360-hinge 104 holds first display 101 up, at an obtuse angle with respect to first display 101. Meanwhile, hinge configuration 1200C of FIG. 12C shows a tablet, book, or display posture (depending upon the resting angle and/or movement of IHS 100), with 360-hinge 104 holding first and second displays 101/102 at a straight angle (180°) with respect to each other. And hinge configuration 1200D of FIG. 12D shows a tablet or book configuration, with 360-hinge 104 holding first and second displays 101 and 102 at a 360° angle, with their display surfaces in facing opposite directions.

FIGS. 13A and 13B illustrate a jaws hinge implementation, usable as hinge 104 in IHS 100, in two different configurations 1300A and 1300B. Specifically, jaws hinge 104 has two rotation axes, parallel to each other, one axis for each respective one of displays 101/102. A solid bar element 104 between the two rotation axes may be configured to accommodate docking compartment 1301 for stylus 108, audio speaker(s) 1302 (e.g., monaural, stereo, a directional array), and one or more ports 1303 (e.g., an audio in/out jack).

Hinge configuration 1300A of FIG. 13A shows the laptop posture. In this case, jaws hinge 104 holds first display 101 up, at an obtuse angle with respect to second display 102. In contrast, hinge configuration 1300B of FIG. 13B shows a tablet or book posture, with jaws hinge 104 holding first and second displays 101 and 102 at a 360° angle with respect to each other, with keyboard 103 stored in between displays 101 and 102, in a back-to-back configuration, such that stylus 108 remains accessible to the user.

FIG. 14 illustrates accessory charging system 1400, with accessory wells 1301 and 1401 shown on hinge 104 that couples first display 101 to second display 102. In various embodiments, accessory wells 1301 and 1401 may be formed of molded or extruded plastic. In this example, accessory well 1301 is shaped to hold pen or stylus 108, and accessory well 1401 is shaped to hold earbud 109. In some implementations, wells 1301 and/or 1401 may include electrical terminals for charging a battery within the accessory, and/or to check a status of the accessory (e.g., presence, charge level, model or name, etc.).

FIG. 15 illustrates a watchband hinge implementation, usable as hinge 104 in IHS 100, in configuration 1500. Specifically, watchband hinge 104 comprises a plurality of metal cylinders or rods, with axes parallel to each other, held together by bracket 1503 and/or fabric 1501. In operation, bracket 1503 may include notches and/or detents configured to hold cylinders 1502 at predetermined positions corresponding to any available IHS posture.

FIGS. 16A-C illustrate a gear hinge implementation, usable as hinge 104 in IHS 100, in configurations 1600A-C. Specifically, configuration 1600A of FIG. 16A shows gear hinge 104 with bar 1603 having teeth or gears 1604 fabricated thereon, as IHS 100 begins to assume a laptop posture. Display 101 has teeth or gears 1601 alongside its bottom edge, whereas display 102 has teeth or gears 1602 alongside its top edge. Bracket(s) 1605 hold gears 1601 and/or 1602 against gear 1604, therefore provides two parallel rotation axes between displays 101 and 102.

Hinge configuration 1600B of FIG. 16B shows a closed posture. In this case, gear hinge 104 holds display 101 facing down, and display 102 is rotated 360° degrees with respect to display 101, so that its display surface faces up against display 101. In this configuration, keyboard 103 may sit under display 102, for example, to cause display 102 to rest at an angle when IHS 100 is placed in laptop posture. In some cases, keyboard 103 may be coupled to the back of display 102 using an accessory backpack or the like, as shown in FIG. 19.

Hinge configuration 1600C of FIG. 16C shows a tablet or book posture. In this case, gear hinge 104 holds display 102 facing up, and display 101 is rotated 360° degrees with respect to display 102, so that its display surface faces down against the horizontal plane. In this configuration, keyboard 103 rests between the back of display 101 and the back of display 102. In various embodiments, bar 1603 may be split into a plurality of segments or links, as shown in configurations 1600B and 1600C, to provide additional axes of rotation between displays 101 and 102, and to accommodate both keyboard options with different IHS thicknesses.

FIGS. 17A and 17B illustrate a slide hinge implementation, usable as hinge 104 in IHS 100, in various configurations. Specifically, in FIG. 17A, link 1701, held by first display bracket 1702 coupled to display 101, slides up and down slot 1704 of bracket 1703 coupled to display 102. In some cases, a locking mechanism may be employed to stably hold displays 101 and 102 in different postures, as link 1701 slides up and down and/or as display 101 rotates around display 102, such as the closed posture of configuration 1700A, the laptop posture of configuration 1700B in FIG. 17B, the tablet posture of configuration 1700C (back to FIG. 17A), or the book posture of configuration 1700D (also in FIG. 17A).

FIGS. 18A and 18B illustrate a folio case system in configurations 1800A and 1800B, according to some embodiments. Specifically, folio case 1801 may include a set of hard foldable sections or flaps wrapped in fabric and/or plastic, with snapping magnetic attachment points, for example, around the edge on the back of displays 101 and 102, and/or keyboard 103. In some cases, keyboard 103 may be removable from case 1801. Additionally, or alternatively, the presence and state of case 1801 may be detectable via sensors 303.

In configuration 1800A in FIG. 18A, displays 101 and 102 are in a laptop posture, and folio case 1801 holds keyboard 103 in a fixed position, off the bottom edge or long side of display 102, such that both displays 101 and 102 remain usable. Meanwhile, configuration 1800B of FIG. 18B shows a display posture (e.g., as in state 901), such that the display surface of display 102 is facing down against folio case 1802, and folio case 1802 holds keyboard 103 in at fixed location, off the bottom edge of display 101, and such that only display 101 is usable.

FIG. 19 illustrates accessory backpack system 1900. In some embodiments, the enclosure of display 102 may include notches 1903 configured to receive lip 1902 of tray 1901, which stays snapped in place until pulled by the user. Additionally, or alternatively, a spring-loaded ejection button may be used. In various configurations, tray 1901 may hold keyboard 103 or battery 110. Moreover, in some cases, the enclosure of display 102 may include electrical terminals usable to charge and/or obtain sensor information from accessories.

Touch Input Correction

Within each of displays 101/102, a touchscreen or digitizer may be overlaid onto an LCD. As part of the manufacturing process of displays 101/102, a location on the touchscreen or digitizer layer within a display (e.g., a “contact location” in touchscreen coordinates) may be perpendicularly mapped to a corresponding location on the LCD layer of that same display (a “display location” in display coordinates).

In normal use, however, if a user is not perfectly perpendicularly aligned with the intended contact and display locations, a “parallax effect” associated with the user's viewing angle may result in errors, such as, for example, accidental touch input selections. Hence, IHS 100 often undergoes a calibration process, sometimes managed by the IHS's OS or configuration utility, whereby a set of visual targets is presented to a user, and the user touches stylus 108 (or a tip of their finger) to a contact location where the user perceives each target to be displayed.

Data is collected for each target location, and then used to estimate offsets, in the x axis and in the y axis, between the actual contact location (e.g., the portion of the touchscreen or digitizer that is actually touched by the tip of stylus 108 or the user's finger), or the location that actually senses any hovering, and an intended contact location (e.g., the portion of digitizer that corresponds, perpendicularly, to the display location of a visual target). These offset values, also referred to as parallax values, correspond to the difference between a contact location on the touch surface perpendicular to a displayed object and a perceived location on the touch surface corresponding to the displayed object.

In some cases, parallax values may be normalized or otherwise used to estimate other offsets for other touch points or visual targets at different locations from those presented during the calibration process. After calibration is completed, parallax values may be used to correct touch events—actual touch or hovering—in a manner that compensates for parallax effects (e.g., by subtracting an x-y offset from each touch event).

Unfortunately, parallax effects are particularly difficult to counter in a dual-screen mobile device such as IHS 100, where the posture and pen angle employed during normal use can vary significantly from the posture and pen angle used during the calibration process. In that case, when IHS 100 changes postures and/or orientation, the parallax effect also changes. As a result, variations in posture and position of IHS 100 can create inconsistent experiences for pen accuracy between first and second displays 101/102.

To address these, and other problems, systems and methods described herein provide touch input correction for a multi-form factor IHS. During operation of IHS 100, the user may transition or manipulate displays 101 and 102 into different postures (e.g., laptop, tablet, etc.) using hinge 104 and/or orientations. To maintain high-accuracy of the touch input interface in different postures, in response to a change in hinge angle, IHS 100 may correct one or more touch input setting(s) or parameter(s) in first display 101 and/or second display 102, such as one or more parallax values, specifically for its current posture and/or orientation.

In some embodiments, parallax value(s) may be calculated, at least in part, based upon a current posture and/or orientation of IHS 100. Additionally, or alternatively, parallax value(s) derived during an original calibration procedure may be adjusted or corrected to account for the current posture and/or orientation of IHS 100.

Corrected or newly calculated parallax values may be used to offset rendered objects on the LCD, such that objects are within the line of sight of the user in the present posture and/or orientation (which again may be different from the posture and/or orientation used during calibration). Additionally, or alternatively, by remapping contact locations on the touchscreen or digitizer to display locations on the LCD using corrected parallax value(s), touch inputs provided via stylus 108 may be offset and/or shifted to their intended contact locations.

In some implementations, adjusted or corrected parallax values may be calculated for every contact location. In other embodiments, one or more adjusted or corrected parallax values calculated for one or more contact locations may be used to derive parallax values for one or more other contact locations, for example, by mathematical interpolation or extrapolation.

One or more corrected parallax values may be calculated, derived, and/or retrieved based on current posture, orientation, and/or hinge angle of IHS 100. A service may be configured to read context information from an OS and applications, identify the posture that IHS 100 is currently in (for example, based on an angle of hinge 104), and manage touch input operations, for example, by re-calculating and/or normalizing calibration tables and/or values for the current posture, orientation, and/or hinge angle.

FIGS. 20A and 20B illustrate touch inputs received by a multi-form factor IHS with different hinge angles and/or postures. In configuration 2000A of FIG. 20A, IHS 100 is in a canvas posture with hinge 104 at a straight angle such that displays 101 and 102 both sit horizontally on a flat surface. In this position, parallax values may be acquired and stored (during calibration) and/or applied (during normal use) for first contact location 2001A (of a first digitizer) or a first display location (of a first LCD) within first display 101, and second contact location 2002A (of a second digitizer) and/or second display location (of a second LCD) within second display 102.

For example, at second contact location 2002A, stylus 108 is used with first azimuth (θ_(A)) of 45° and a polar angle (φ_(A)) of 130°. An actual contact location may be mapped to a perceived contact location by calculating a distance offset e.g., in mm or pixels) between the contact location of stylus 108 (with the touchscreen or digitizer) and the perceived contact location (on the underlying display surface of display 102). The distance offset may be based on the parallax angle (line of sight) and the perpendicular separation between the digitizer's surface and the LCD surface in the display stack. For example, the distance offset may be based on the product of the separation and a tangent of a parallax angle. Moreover, the offset may comprise vertical and/or horizontal components (x and y).

During normal use in configuration 2000B of FIG. 20B, the canvas posture is again assumed, but now such that first display 101 is tilted by angle β₁ (e.g., 25°) and second display 102 (e.g., 35°) is titled by angle β₂. This results in a hinge angle (α), which causes stylus 108 to be used with second azimuth (θ_(B)) of 20° and a polar angle (φ_(A)) of 165°. As a consequence, the parallax effect may be perceived differently at locations 2002A and 2002B, between configurations 2000A and 2000B, depending upon hinge angle α. Accordingly, in some cases, parallax values may be calculated that take hinge angle α (or angles β₁/β₂) into account. In other cases, parallax values derived or stored for configuration 2000A may be adjusted, corrected, re-calculated, normalized, or retrieved using the hinge angle and/or the position/orientation changes of displays 101/102 in configuration 2000B.

In some implementations, different ranges of hinge angles may be mapped to different IHS postures as follows: closed posture (0 to 5 degrees), laptop or book posture (5 to 175 degrees), canvas posture (175 to 185 degrees), tent or stand posture (185 to 355 degrees), and/or tablet posture (355 to 360 degrees). In response to changes in hinge angle, for example, parallax values may be adjusted and/or corrected, and applied to one or more contact locations of displays 101/102. Thus, in some cases, a touch input calibration procedure may be modified to account for the hinge angle, display position, and/or orientation in use at the time of calibration, as described in FIG. 21.

FIG. 21 is a flowchart of method 2100 for touch input calibration of a multi-form factor IHS. In some embodiments, at least a portion of method 2100 may be performed by display or touch controller(s) 204 in cooperation with multi-form factor configuration engine 401 under execution of processor 201.

Particularly, method 2100 starts at block 2101. At block 2102, the user is asked to place first display 101 directly in front of them (e.g., in the horizontal position, on a desk, etc.), and to follow one or more calibration points displayed on the LCD of display 101. For example, physical contact between stylus 108 and the touchscreen of display 101 may be used to generate touch inputs at selected contact locations. Parallax values may be calculated based upon the received inputs to remap contact locations to proper display locations along the line of sight of the user. If block 2103 determines that calibration is not finished, control returns to block 2102.

At block 2103, if the calibration of first display 101 is completed, method 2100 proceeds to block 2104. At block 2104, one or more calibration or parallax values are stored, along with 9-DOF coordinates of displays 101/102 and/or hinge angle of IHS 100, in a look-up table (LUT) or database.

At block 2105, the user is asked to place second display 102 directly in front of them, and to follow one or more calibration points. Again, physical contact between stylus 108 and the touchscreen of display 102 may be used to generate touch inputs at selected contact locations, and parallax values may be calculated to remap contact locations to proper display locations on the LCD of display 102 along the line of sight of the user. If block 2106 determines that calibration is not finished, control returns to block 2105.

At block 2106, if the calibration of second display 102 is completed, method 2100 proceeds to block 2107. At block 2107, one or more calibration or parallax values are stored, along with 9-DOF coordinates of displays 101/102 and/or hinge angle of IHS 100, in the LUT.

At block 2108, the user is asked to place both first display 101 and second display 102 102 directly in front of them, and to follow one or more calibration points. In some cases, one or more calibration or parallax values are stored, along with 9-DOF coordinates of displays 101/102 and/or hinge angle of IHS 100, in the LUT. After block 2109, if the calibration of both displays 101/102 is done, method 2100 ends at block 2110.

FIG. 22 is a flowchart of method 2200 for automatically correcting touch input in a multi-form factor IHS in response to hinge angle, posture, and/or orientation changes. In some embodiments, at least a portion of method 2200 may be performed by display or touch controller(s) 204 in cooperation with multi-form factor configuration engine 401 under execution of processor 201.

Particularly, method 2200 starts at block 2201. At block 2202, method 2200 determines whether the orientation of IHS 100 has changed (e.g., between portrait orientation 701 of FIG. 7A and landscape orientation 704 of FIG. 7D). If so, block 2203 may re-normalize parallax values for one or more contact locations across displays 101/102 to match respective display corners due to the detected rotation.

Consider, for example, that a point in the upper right corner of display 102, in landscape mode, moves to the bottom left corner (relative to the user) when display 102 is rotated 180° to portrait mode. As such, parallax values used for that same point, in the two orientations, may be different from each other, for example, so that the “ink” or cursor produced by the tip of stylus 108 is not occluded by the stylus itself after the orientation change). In some cases, an originally calculated parallax value for the bottom left corner may be re-normalized for the width and length of the display (e.g., pixel ratio), assuming that a user is generally positioned near the center of the display.

Additionally, or alternatively, at block 2204, method 2200 determines whether the 9-DOF position and/or direction of displays 101/102 has changed. For example, while in canvas posture, displays 101 and 102 may be operated with display angles β₁ and β₂, as shown in FIG. 20B. In response, block 2205 may adjust or correct parallax values for each contact point on displays 101/102. For example, block 2205 may geometrically subtract or compensate the current azimuth and/or polar angles of display(s) 101/102 (or the difference between the present azimuth and/or polar angles of display(s) 101/102 and the azimuth and/or polar angles of display(s) 101/102 used during calibration) from the current azimuth and/or polar angles of stylus 108. Additionally, or alternatively, block 2205 may retrieve new touch input calibration or parallax values to be applied to displays 101/102 corresponding to angles β₁ and β₂, in their respective positions, from an LUT or database.

Additionally, or alternatively, at block 2206, method 2200 determines whether angle of hinge 104 has changed. For example, the hinge angle may indicate that IHS 100 is presently configured in laptop, canvas, tent, stand, and/or tablet posture. In response, block 2207 may normalize or re-calculate the touch input calibration or parallax values for each contact point on displays 101/102 using the hinge angle change (e.g., relative to the hinge angle used during calibration). Additionally, or alternatively, block 2207 may retrieve new touch input calibration or parallax values to be applied to displays 101/102, for a detected hinge angle, from the LUT or database. Then, method 2200 ends at block 2208.

As noted above, display device(s) 101/102 may be provided as a single continuous display. In those cases, changes in hinge angle across the various postures of IHS 100 may also produce a different bend angle or bend/curvature radius of the display (e.g., 3 mm); which in turn may cause a relative translation between internal touchscreen display layers within that display. Accordingly, parallax values may be further adjusted, corrected, or calculated to compensate for different postures, in response to the current bend angle or bend radius values, for example, as stored in an LUT or by using a mathematical equation.

Systems and methods described herein may further identify a position of keyboard 103 (e.g., at a given distance from hinge 104 on top of second display 102 when IHS 100 is in laptop posture; FIG. 10A), and may normalize or re-calculate parallax values for each contact point on displays 101/102 depending upon the keyboard's position. In some implementations, to account for a change in stylus 108's angles θ and/or φ when keyboard 103 is present atop second display 102, for example, corrected parallax values may be used only in a sub-region of second display 102 (e.g., immediately below keyboard 103) for that configuration. When keyboard 103 is removed, the original parallax values stored or calculated for second display 102 in its present posture may be used.

It should be understood that various operations described herein may be implemented in software executed by logic or processing circuitry, hardware, or a combination thereof. The order in which each operation of a given method is performed may be changed, and various operations may be added, reordered, combined, omitted, modified, etc. It is intended that the invention(s) described herein embrace all such modifications and changes and, accordingly, the above description should be regarded in an illustrative rather than a restrictive sense.

Although the invention(s) is/are described herein with reference to specific embodiments, various modifications and changes can be made without departing from the scope of the present invention(s), as set forth in the claims below. Accordingly, the specification and figures are to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be included within the scope of the present invention(s). Any benefits, advantages, or solutions to problems that are described herein with regard to specific embodiments are not intended to be construed as a critical, required, or essential feature or element of any or all the claims.

Unless stated otherwise, terms such as “first” and “second” are used to arbitrarily distinguish between the elements such terms describe. Thus, these terms are not necessarily intended to indicate temporal or other prioritization of such elements. The terms “coupled” or “operably coupled” are defined as connected, although not necessarily directly, and not necessarily mechanically. The terms “a” and “an” are defined as one or more unless stated otherwise. The terms “comprise” (and any form of comprise, such as “comprises” and “comprising”), “have” (and any form of have, such as “has” and “having”), “include” (and any form of include, such as “includes” and “including”) and “contain” (and any form of contain, such as “contains” and “containing”) are open-ended linking verbs. As a result, a system, device, or apparatus that “comprises,” “has,” “includes” or “contains” one or more elements possesses those one or more elements but is not limited to possessing only those one or more elements. Similarly, a method or process that “comprises,” “has,” “includes” or “contains” one or more operations possesses those one or more operations but is not limited to possessing only those one or more operations. 

The invention claimed is:
 1. An Information Handling System (IHS), comprising: a processor; and a memory coupled to the processor, the memory having program instructions stored thereon that, upon execution by the processor, cause the IHS to: identify a posture of a first display relative to a second display; process a stylus input using at least one parallax value calculated, at least in part, based upon the posture; identify a position of a keyboard; and in response to the position of the keyboard, modify the at least one parallax value.
 2. The IHS of claim 1, wherein to identify the posture, the program instructions, upon execution by the processor, further cause the IHS to: receive an indication of an angle of a hinge coupling the first display to the second display; and identify the posture that corresponds to the angle, wherein the posture is selected from the group consisting of: laptop posture, canvas posture, tablet posture, stand posture, and tent posture.
 3. The IHS of claim 2, wherein the posture is identified as the laptop posture in response to: the first display being placed at an obtuse angle with respect to the second display, and the second display being placed in a horizontal position with a display surface facing up.
 4. The IHS of claim 2, wherein the posture is identified as the canvas posture in response to: the first display being placed at a straight angle with respect to the second display, and the first and second displays being placed in a horizontal position with first and second display surfaces facing up.
 5. The IHS of claim 2, wherein the posture is identified as the tablet posture in response to: a first display surface of the first display being placed facing up, and a back surface of the first display being placed against a back surface of the second display.
 6. The IHS of claim 2, wherein the posture is identified as the stand posture in response to the first display being placed at an acute angle with respect to the second display.
 7. The IHS of claim 2, wherein the posture is identified as the tent posture in response to a first display surface of the first display being placed at an obtuse angle with respect to a second display surface of the second display.
 8. The IHS of claim 1, wherein the at least one parallax value comprises: a first parallax value in a first axis, and a second parallax value in a second axis.
 9. The IHS of claim 1, wherein the program instructions, upon execution by the processor, further cause the IHS to: identify an orientation of at least one of the first or second displays, and wherein the at least one parallax value is calculated, at least in part, based upon the orientation.
 10. The IHS of claim 9, wherein the orientation is selected from the group consisting of: landscape and portrait.
 11. The IHS of claim 1, wherein the program instructions, upon execution by the processor, further cause the IHS to: identify a change of position of at least one of the first or second displays; and in response to the change of position, adjust at least a first parallax value based on a first angle of the first display, and adjust at least a second parallax value based on a second angle of the second display.
 12. The IHS of claim 1, wherein the keyboard is detected atop the second display, and wherein the stylus input is received in a region of the second display dynamically selected in response to the position of the keyboard.
 13. The IHS of claim 1, wherein the program instructions, upon execution by the processor, further cause the IHS to: identify a change from the posture to another posture; and process another stylus input using at least one other parallax value calculated, at least in part, based on the other posture.
 14. A method, comprising: determining a bend radius of a display; processing a touch input received via the display using at least one parallax value calculated, at least in part, based upon the bend radius; identifying a position of a keyboard; and in response to the position of the keyboard, modifying the at least one parallax value.
 15. The method of claim 14, wherein the touch input comprises: a finger touch or a stylus touch.
 16. The method of claim 14, further comprising: identifying a change from the bend radius to another bend radius; and processing another touch input using at least one other parallax value calculated, at least in part, based upon the other bend radius.
 17. A hardware memory device having program instructions stored thereon that, upon execution by a processor of an Information Handling System (IHS), cause the IHS to: determine an orientation of a first display coupled to a second display via a hinge; process a touch input using at least one parallax value calculated, at least in part, based upon the orientation; identify a position of a keyboard; and in response to the position of the keyboard, modify the at least one parallax value.
 18. The hardware memory device of claim 17, wherein the program instructions, upon execution by the processor, further cause the IHS to determine an angle of the hinge, and wherein the parallax value is further calculated, at least in part, based upon the angle.
 19. The hardware memory device of claim 17, wherein the program instructions, upon execution by the processor, further cause the IHS to: identify a change from the orientation to another orientation; and process another touch input using at least one other parallax value calculated, at least in part, based upon the other orientation. 